A wind turbine operating state determination method

Abstract

The application discloses a kind of wind turbine operating state judging methods, comprising: according to factory station name, unit number establishes standardization measuring point, obtains each wind turbine relevant operating measuring point data;According to wind turbine circuit breaker measuring point state value, wind turbine output judges wind turbine operation, power limiting state;According to wind turbine circuit breaker state, wind turbine speed judges wind turbine shutdown, standby state;According to wind turbine circuit breaker state, wind turbine locking signal judges wind turbine maintenance state, according to wind turbine fault state feature set, wind turbine fault is detected to judge wind turbine fault state.The application is more standardized to the operating state of wind turbine, and it is convenient to promote the unification of wind farm group management, centralization, to provide solid technical guidance for intelligent wind power operation management.

Description

Technical Field

[0001] This invention belongs to the field of wind power technology, and specifically relates to a method for judging the operating status of wind turbine units. Background Technology

[0002] Currently, the operational status of wind turbines is primarily determined by the logic of data uploaded from turbine sensors by the field control processor. However, for large-scale wind farms monitored by the regulatory center, inconsistencies in the logic of judgments within the turbine manufacturers' controllers, incomplete turbine status definitions, and communication and data collection limitations prevent the transmission of the six traditional wind power industry statuses (operation, fault, standby, maintenance, shutdown, and power curtailment) to the regulatory center for statistical analysis. This hinders the effective assessment of turbine output and the subsequent adjustment of wind turbine operations. Therefore, it is necessary to utilize existing operational data from the regulatory center, combined with the operational characteristics of turbines under various statuses, to standardize the definition of turbine status and make operational status judgments. Summary of the Invention

[0003] To address the technical problems existing in the prior art, this invention provides a method for judging the operating status of wind turbine units, which solves the shortcomings of existing wind farms that make it impossible to make standardized judgments on the status of wind turbines due to incomplete statistics on the operating status of wind turbines, inconsistent status logic, and non-standardized fault status code definitions.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A method for determining the operating status of a wind turbine generator includes the following steps:

[0006] Step 1: Establish standardized measuring points according to the plant name and unit number, and obtain relevant operating measuring point data for each wind turbine; the specific implementation steps are as follows:

[0007] Step S101: Establish standardized codes that can be recognized by programming languages ​​based on the pinyin codes, unit numbers, and data objects of each plant / station;

[0008] Step S102: Collect, store, and retrieve relevant data on-site according to the standard coding.

[0009] Step 2: Determine the fan operation and power restriction status based on the status values ​​of the fan circuit breaker measuring points and the fan output; the specific implementation steps are as follows:

[0010] Step S201: Obtain the closing signal of the wind turbine circuit breaker. When the circuit breaker is in the closed position, proceed to the operation and power limitation judgment.

[0011] Step S202: Based on the power curve of the wind turbine generator set and the two-dimensional characteristic data table of wind speed and power;

[0012] Step S203: Based on the two-dimensional feature data table of wind speed and power, perform data fitting to obtain the power output expression of the wind turbine;

[0013] Formula (1)

[0014] Step S204: Substitute the measured wind speed data into the wind turbine power expression to obtain the theoretical power generation, and compare the theoretical power generation with the measured power generation.

[0015] If Formula (2)

[0016] Where formula (1) represents the actual operating power of the wind turbine, The theoretical power calculated under the actual wind speed x is represented in formula (2). This represents the actual operating power of the wind turbine. If the system continues to run for 1 minute, it can be determined that it is in a power-limited state; otherwise, it is in an operating state.

[0017] Step 3: Determine the fan's shutdown or standby status based on the fan circuit breaker status and fan speed; the specific implementation steps are as follows:

[0018] Step S301: Obtain the closing signal of the wind turbine circuit breaker. When the circuit breaker is in the open position, proceed to the shutdown or standby judgment.

[0019] Step S302: Obtain the measured wind speed value of the fan and determine whether the measured wind speed value is greater than the minimum fan start-up wind speed;

[0020] Step S302: After the measured wind speed is greater than the minimum starting wind speed of the fan for 1 minute, determine whether the fan speed is greater than the fan starting speed.

[0021] Step S303: If the conditions in steps S301 to S302 are met, then the fan is determined to be in standby mode; otherwise, it is in shutdown mode.

[0022] Step 4: Determine the fan maintenance status based on the fan circuit breaker status and fan interlock signal; the specific implementation steps are as follows:

[0023] According to step S303, the status value is determined. When the unit is in the shutdown state, the mechanical interlock signal status of the fan is acquired. If the mechanical interlock signal of the fan is true, the fan is determined to be in the maintenance state.

[0024] Step 5: Detect wind turbine faults based on the set of wind turbine fault state characteristics and determine the wind turbine fault state; the specific implementation steps are as follows:

[0025] Step S501: While the wind turbine is running, monitor the voltage deviation at the wind turbine terminals to ensure it is greater than [value missing]. The rated voltage or the frequency of the monitored fan terminal is greater than Rated frequency;

[0026] Step S502, when the wind turbine is in operation, when the wind turbine yaw angle is greater than... 400°;

[0027] Step S502: When the fan is not under maintenance, the measured power of the fan is <=1kW and the PLC reports a fault status.

[0028] Step S503: In standby mode, the measured power of the fan is <1kW and the fan speed is > the fan cut-in speed. 130% and fan speed <= 15m / s, for 16 minutes;

[0029] Step 6: Summarize and statistically analyze the wind turbines according to their operating status, based on the plant name and unit number.

[0030] The present invention has at least the following beneficial technical effects:

[0031] 1. Before logical processing, the present invention first standardizes the field measurement point data labels and classifies them according to the method of plant name + wind turbine name + equipment name. This provides the prerequisite for the program's automated cyclic judgment, making it possible to automatically judge a large number of wind turbine units in the group.

[0032] 2. Based on the power output curve data of each wind farm, this invention performs polynomial fitting on the power output expression of the wind turbine, providing data assurance for the calculation of the theoretical output power of the wind turbine under different wind speeds, and providing a simple and feasible basis for judging the power limitation status of the wind turbine.

[0033] 3. This invention utilizes the operating data of the fan and combines it with the operating mechanism of the fan to classify, judge and summarize the status of the fan, avoiding the technical shortcomings caused by inconsistent judgment logic in the controller of the fan manufacturer, incomplete fan status definition, or communication and collection reasons that cannot meet the requirements of collecting all statuses.

[0034] 4. The present invention introduces the concept of a set of wind turbine faults to determine the fault status of wind turbines. This provides a simple and expandable code interface for various fault conditions discovered during subsequent operation. This method is simpler and more feasible than adding sensing points and fault judgment and control logic to the wind turbine site.

[0035] 5. The original unit status determination, such as maintenance logic, was relatively complex and was mainly based on manual reporting. This method determines the status of wind turbine units in real time based on the operating characteristic data of the wind turbine units, which reduces a lot of manual reporting time, reduces the false alarm rate caused by delays and omissions in manual reporting, and improves the efficiency of safety supervision.

[0036] 6. This invention incorporates data anomaly handling and provides data anomaly alarms to improve system reliability. This invention utilizes operational data aggregated and uploaded by the wind power monitoring center, and classifies and summarizes the various states of each wind turbine based on their operational mechanisms under different conditions. This provides effective data support for statistics on wind farm output, operation and maintenance levels, and equipment failure rates. Attached Figure Description

[0037] Figure 1 Wind power production supervision network diagram

[0038] Figure 2 This is a wind speed-power curve for a certain type of fan.

[0039] Figure 3 This is a curve showing the wind speed-power fitting of a certain type of wind turbine.

[0040] Figure 4 This is a statistical analysis chart of actual operating data for a certain type of wind.

[0041] Figure 5 This is a graph showing the relationship between the speed and torque of a wind turbine generator.

[0042] Figure 6 This is a logic diagram for determining the operating status of a certain wind turbine. Detailed Implementation

[0043] To make the technical problems solved by the present invention, the technical solutions, and the beneficial effects clearer, the following specific embodiments provide a further detailed description of the present invention. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0044] Reference Figure 6 The present invention provides a method for determining the operating status of a wind turbine, comprising the following steps:

[0045] Step 1: Establish standardized measuring points according to the plant name and unit number, and obtain relevant operating measuring point data for each wind turbine;

[0046] Step S101: Establish standardized codes that can be recognized by programming languages ​​based on the pinyin codes, unit numbers, and data objects of each plant / station. For example, the names of the wind speed and power measurement points of wind turbine No. 1 in Haiwang Island wind farm are: HWD.U1.V_win and HWD.U1.W_Fan.

[0047] Step S102, refer to Figure 1 As shown, the collection, storage, and retrieval of relevant data on site are completed according to the standard coding. Wind farm data collection is generally conducted through communication via power protocol. Operational data is transmitted according to the address bits. After the acquisition program obtains the data according to the address bits, it stores the data in the monitoring center database according to the measurement point name corresponding to the measurement point table.

[0048] Step 2: Determine the fan operation and power restriction status based on the status values ​​of the fan circuit breaker measuring points and the fan output;

[0049] Step S201: Obtain the closing signal of the wind turbine circuit breaker. If the circuit breaker is in the closed position, proceed to operation and power limitation judgment.

[0050] Step S202: Based on the power curve of the wind turbine generator set and the obtained two-dimensional characteristic data table of wind speed and power; such as Figure 2 The image shows the wind speed-power curve for a 2.5MW wind turbine in a certain wind farm. Based on the wind speed-power curve, Table 1, containing the corresponding two-dimensional characteristic data for this turbine model, can be obtained:

[0051] Table 1 - Interpolated data for fan power and wind speed

[0052]

[0053] Step S203: Based on the two-dimensional feature data table of wind speed and power, perform data fitting to obtain the power output expression of the wind turbine;

[0054] Formula (1)

[0055] Wherein: the correlation coefficient of the fitted curve R² = 0.999.

[0056] Step S204: Substitute the measured wind speed data into the wind turbine power expression to obtain the theoretical power generation, and then compare the theoretical power generation with...

[0057] Comparison of measured power:

[0058] If Formula (2)

[0059] Where formula (1), The theoretical power calculated under the actual wind speed x is represented in formula (2). Represents the actual operating power of the wind turbine, combined with Figure 4 This is a scatter plot of the measured power of a wind turbine at different wind speeds. Statistical analysis shows that under normal power generation conditions, the deviation from the theoretical power is less than 10%. If the system runs continuously for 1 minute, it can be determined to be in a power-limited state; otherwise, it is in an operating state.

[0060] Step 3: Determine the fan's shutdown or standby status based on the status of the fan circuit breaker and the fan speed;

[0061] Step S301: Obtain the closing signal of the wind turbine circuit breaker, obtain the circuit breaker open position HWD.U1_State_Break=0, and proceed to the shutdown / standby judgment.

[0062] Step S302: Obtain the measured wind speed value of the fan and determine whether the wind speed value is greater than the minimum fan start-up wind speed. According to the data in Table 1, the judgment condition is HWD.U1.V_win>3(m / s);

[0063] After the measured wind speed is greater than the minimum starting wind speed of the fan for 1 minute, determine whether the fan speed is greater than the fan starting speed; based on Figure 5 The graph shows the relationship between wind turbine generator speed and torque. When the wind turbine generator speed reaches 100 rpm, the generator is ready to generate electricity. Because it has an internal gear speed-up device, the speed of the low-speed shaft is increased by 50 times, reaching 1500 rpm, which drives the generator. Therefore, the standby condition for the wind turbine is HWD.U1.Rpm_Fan>2 (rpm).

[0064] Step S303: If all conditions in steps S301 to S302 are met, then the fan is determined to be in standby mode, and the output measurement point value is:

[0065] HWD.U1.State_Standby = 1; otherwise, the system is in a stopped state, and the output measurement point value is: HWD.U1.State_Stop = 1;

[0066] Step 4: Determine the maintenance status of the wind turbine based on the status of the wind turbine circuit breaker and the wind turbine interlock signal;

[0067] Based on step S303, when the unit is in a stopped state, the mechanical interlock signal status of the fan continues to be acquired. If the mechanical interlock signal of the fan is true, then the fan is determined to be in a maintenance state.

[0068] If HWD.U1.State_Stop=1&HWD.U1.State_MachLock=1, HWD.U1.State_Fix=1;

[0069] Step 5: Detect and judge the fan faults based on the set of fan fault state characteristics;

[0070] Step S501: While the wind turbine is running, monitor the voltage at the wind turbine terminals. Deviation greater than Rated voltage or fan terminal frequency Greater than Rated frequency ;

[0071] The judgment condition is: HWD. .U_Fan<0.95 || HWD. .U_Fan>1.05

[0072] Or HWD. .F_Fan<0.95 || HWD. .F_Fan>1.05 This is in accordance with the wind turbine design specifications. =690V =50Hz.

[0073] Step S502, when the wind turbine is in operation, when the wind turbine yaw angle HWD.U1.Angle_Fan> 400°

[0074] Step S502: When the fan is not under maintenance, the active power is <= 1 and the PLC reports a fault status.

[0075] Specific: if HWD.U1.State_Fix=0; HWD.U1.W_Fan<1&HWD.U1.Err_PLC=1, then HWD.U1.State_Err=1;

[0076] In step S503, during standby mode, the power is <1 and the fan speed is > the cut-in fan speed. 130% and wind speed <= 15 meters per second, lasting for 16 minutes. Specifically: If the data measurement point value HWD.U1.State_Stadnby=1, HWD.U1.W_Fan<1&HWD.U1.V_Win>3.9, and this continues for 16 minutes, it can be determined that the unit has failed to start, and it will switch to a fault state, outputting the measurement point value HWD.U1.State_Err=1.

[0077] Step 6: Summarize and statistically analyze the wind turbines according to their operating status, based on the plant name and unit number.

[0078] Specifically, the data values ​​are summed and aggregated using the unit number as the repeating number, such as... The total number of operating wind turbines in the wind farm can be obtained, and the number of wind turbines in shutdown, fault, maintenance, standby, and power restriction states can also be counted.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for determining the operating status of a wind turbine generator set, characterized in that, Includes the following steps: Step 1: Establish standardized measuring points according to the plant name and unit number, and obtain relevant operating measuring point data for each wind turbine; the specific implementation steps are as follows: Step S101: Establish standardized codes that can be recognized by programming languages ​​based on the pinyin codes, unit numbers, and data objects of each plant / station; Step S102: Collect, store, and retrieve relevant data on-site according to the standard coding. Step 2: Determine the fan operation and power restriction status based on the status values ​​of the fan circuit breaker measuring points and the fan output; the specific implementation steps are as follows: Step S201: Obtain the closing signal of the wind turbine circuit breaker. When the circuit breaker is in the closed position, proceed to the operation and power limitation judgment. Step S202: Based on the power curve of the wind turbine generator set and the two-dimensional characteristic data table of wind speed and power; Step S203: Based on the two-dimensional feature data table of wind speed and power, perform data fitting to obtain the power output expression of the wind turbine; Official (1) Step S204: Substitute the measured wind speed data into the wind turbine power expression to obtain the theoretical power generation, and compare the theoretical power generation with the measured power generation. If Official (2) Where formula (1) represents the actual operating power of the wind turbine, The theoretical power calculated under the actual wind speed x is represented in formula (2). This represents the actual operating power of the wind turbine. If the system continues to run for 1 minute, it can be determined that it is in a power-limited state; otherwise, it is in an operating state. Step 3: Determine the fan's shutdown or standby status based on the fan circuit breaker status and fan speed; the specific implementation steps are as follows: Step S301: Obtain the closing signal of the wind turbine circuit breaker. When the circuit breaker is in the open position, proceed to the shutdown or standby judgment. Step S302: Obtain the measured wind speed value of the fan and determine whether the measured wind speed value is greater than the minimum fan start-up wind speed; Step S302: After the measured wind speed is greater than the minimum starting wind speed of the fan for 1 minute, determine whether the fan speed is greater than the fan starting speed. Step S303: If the conditions in steps S301 to S302 are met, then the fan is determined to be in standby mode; otherwise, it is in shutdown mode. Step 4: Determine the fan maintenance status based on the fan circuit breaker status and fan interlock signal; the specific implementation steps are as follows: According to step S303, the status value is determined. When the unit is in the shutdown state, the mechanical interlock signal status of the fan is acquired. If the mechanical interlock signal of the fan is true, the fan is determined to be in the maintenance state. Step 5: Detect wind turbine faults based on the set of wind turbine fault state characteristics and determine the wind turbine fault state; the specific implementation steps are as follows: Step S501: While the wind turbine is running, monitor the voltage deviation at the wind turbine terminals to ensure it is greater than [value missing]. The rated voltage or the frequency of the monitored fan terminal is greater than Rated frequency; Step S502, when the wind turbine is in operation, when the wind turbine yaw angle is greater than... 400°; Step S502: When the fan is not under maintenance, the measured power of the fan is <=1kW and the PLC reports a fault status. Step S503: In standby mode, the measured power of the fan is <1kW and the fan speed is > the fan cut-in speed. 130% and fan speed <= 15m / s, for 16 minutes; Step 6: Summarize and statistically analyze the wind turbines according to their operating status, based on the plant name and unit number.

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